In K-readings, what does the smallest number represent?

In K-readings, the smallest number specifically indicates the steepest meridian of the cornea. When measuring the curvature of the cornea, K-readings provide essential data related to the curvature in different meridians. The steepest meridian is typically where the most significant curvature is observed, which is crucial for fitting contact lenses accurately.

Understanding this is paramount for practitioners, as selecting the right base curve for contact lenses is heavily influenced by these measurements. The flattest meridian, marked by the largest number in the K-readings, provides context but is not what the smallest number represents. The average corneal curvature is derived from combining both meridians, and while the ideal base curve relates to fitting lenses, it is not directly indicated by the smallest K-reading. Recognizing that the smallest K-reading correlates specifically with the steepest corneal curvature aids in effective lens selection and fitting processes.